In the centenary year of Alan Turing's birth, Simon Singh discusses the German Enigma cipher machine and how it was cracked by Alan Turing and the other codebreakers at Bletchley Park during the Second World War. The lecture will include a demonstration of a genuine working Enigma machine.

This event is part of the 2012 Cambridge Science Festival - free but pre-booking required: book tickets online or phone the Cambridge Science Festival Office on 01223 766766. (Please note that this event is organised by the Cambridge Science Festival team: please direct any questions to them.)